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(No Model.) v 7 'SheetsSheet 1 T. 8-. CRANE. WOOD'GUT-TING MACHINE.

N 8'i9,451. Patented M6J1. 13, 1888.

(No Model.) v 7 Sheets-Shet2.

T. S.. CRANE.

WOOD CUTTING MACHINE.

No. 379,451. Patented Mar. 13,1888.

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(No Model.) '1 Sheets-Sheet 3.

T. s, CRANE WOOD CUTTING MACHINE. No. 379,451. Patented Mar. 13, 1888.

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No. 379,451. Patented Mar. 13,1888.

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(No Model.)

T. S. CRANE. v WOOD GUTTING'MAGHINE.

No. 379,451. Patented Mar. 13, 1888.

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(No Model.) 7 SheetsShet eI TQS. CRANE. WOOD CUTTING MACHINE.

No. 379,451. Patented Mar. 13, 1-888.

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T. s. CRANE.

WOOD CUTTING MACHINE.

No. 379,451.- Patented Mar. 13, 1888.

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lhvrrnn STATES PATENT rica.

THOMAS S. CRANE, OF BRICK CHURCH, NE\V JERSEY.

WOOD-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent N0. 379,451, dated March13, 1888.

Application filed August 1, 1887.

To aZZ whom, it may concern:

Be it known that I, THOMAS S. CRANE, a citizen of the United States,residing at Brick Church, Essex county, New Jersey, have inventedcertain new and useful Improvements in Wood-Cutting Machines, whichimprovements are fully de-cribed and represented in the followingspecification and the accompanying drawings, forming a part of the same.

This invention relates to that class of woodcutting machines in whichthe log is fed forward to the knife by a sliding stay-log and the knifeis reciprocated over the face of the log by a carrier connected directlywith the piston of a steam-cylinder.

My invention is related to the class of wood cutting or slicing machinesin which a sliver is planed from the wood by a sharp knife, and in whichthe knife is in some cases stationary and the log movable and in othersthelog stationary and the knife moved either by suita ble gearing or bydirect connection with the piston of a steam cylinder.

Heretofore the steam-valves of such actuating-cylinder have beenreversed by dogs upon the knife carrier and tappets fixed upon the framein the path of such dogs, and the feeding mechanism has been actuated bysimilar dogs and tappets, in which construction violent concussions areproduced by the sudden movements of the parts, and the wear and tearupon the valve and feeding mechanisms were correspondingly great. Theknife-carrier was also liable to exceed its normal stroke,and thusproduce damage to the steanrcylinder, if the steam admitted to thecylinder fell beneath its normal pressure and failed to reverse thesteam-piston at the proper time.

The object of this invention is to so improve this class ofdirect-acting-w0od-cutting machines that the motion ofthe knife-carriermay be more certain and more easily controlled; and the mechanism foroperating the cylindervalves, the feed, and the devices for retractingthe stay-log may be simplified in construction and rendered more smoothand durable in their operation.

These improvements consist, primarily, in connecting the reciprocatingknife-carrier by a connecting-rod with a rotating shaft, and

(No model.)

thus securing an easy movement of the carrier when turning each end ofits stroke; and it consists, also,in connecting an auxiliary steamenginewith such rotating shaft to prevent the carrier from sticking at eitherend of its stroke, and in actuating the steam-valves and the feedmechanism by such rotating shaft, and in retracting the stay-log bymeans connected with the auxiliary engine when the knife-carrier isstopped to substitute a fresh log.

My invention also consists in certain details of construction,hereinafter pointed out and claimed.

In the drawings, Figure 1 shows in front elevation, upon a scale ofthree-eighths of an inch to one foot, 3. wood-cutting machine having thesteam-cylinder arranged to reciprocate the carrier at an angle offorty-five degrees before the log. Fig. 2 is an end elevation of thesame. Fig. 3 is a plan of the same. Fig. 4 is an elevation of the partsin the rear of line y y in Fig. 3. Fig. 5 is a rear elevation, upon alarger scale, of portion of the rear beam, C, and end of the bed C, withthe feeding and retracting devices, the arm on being depressed.

Fig. 6 is a side elevation, upon a similar scale,

of the feeding and retracting devices at the right of linear m in Fig.3, the view being taken from the left side of such figure, and the arm mand the cranks o and 1" being elevated. Fig. 7 is a front view of thestay-log, upon a still larger scale, detached from itssliding brackets.Fig. 8 is an end view of the same, and Fig. 9 is a view ofthe bottomedge of the same with one end broken away to the edge of the bar 9, ason dotted line z z in Fig. 7. Fig. 10 is an end view, and Fig. 11 afront view, upon a much larger scale, of the lever-dog. Fig. 12 is anedge view, upon a still larger scale, of the feed-wheel andpawl-releasing de vices. Fig. 13 is a side View of the same, and Fig. 14is a view similar to Fig. 12, of the opposite side of the pawl-arm andattachments of the feedwheel. Fig. 15 is a plan, upon a larger scalethan Fig. 3, of the rear ends of the feedscrews, with theirconnectingchains and the clearance-sleeves and the hearings in whichthey are journaled; and Fig. 16 is an outside view,'npon a stilllargerscale, of one of the clearance-sleeves with its attached crank.

by sprocket-wheels e and chain e.

The machine shown in the drawings consists in a base-plate, A, and a bedsustained above the same by posts B, B, and B and consisting in a frontbeam, 0, a rear beam, 0, a bed, 0, and an end beam, C

D is the stay-log, and D its sliding brackets fitted to dovetails D uponthe bed 0 and moved to and from the front edge of the beam 0 by screwsE, which are connected together (Shown only in Figs. 3, 6, and 15.)

F F are the ways for the knife-carrier G, and H is the steamcylinder,having a piston connected directly to the carrier by the pistonrod I,and mounted upon the base A by a standard, H.

J-is a crank-shaft mounted in bearings K, affixed to the posts B and B",and J is a crank connected with the carrier by a pivoted connecting-rod,L.

' and P is a shaftjournaled upon said post and provided with aclutch-pulley, P actuated by a belt, 1?, from a pulley, P, on the engineP.

In Fig. 4 only the shaft Pand the pulley P of the engine are shown; butin Figs. 1, 2, and 3 the engine is designated by an upright frame andcylinder of a type very common in the open market.

The lever N is pivoted upon a shaftm, which 40 is provided with acrankm, which is connected by a rod, if, to the clutchlever 0". Theknifecarrier is shown partly in section in Fig. 2, with the knife 75fixed in an aperture or throat extending through the carrier adjacent toa roller, a, which presses upon the wood prior to the cut, and theveneer or slice a passes through a throat between the knife and roller,and is discharged from the front side of the carrier. The knife projectsfrom the side of the carrier toward the log, and the stay-log issupported and moved in such manner as to present the side of the log tothe knife.

The chief power of the machine is derived from the steam operating inthe cylinder H to reciprocate the rod 1 and carrier G, and the movementof the carrier produces, through the connecting-rod L, a rotary motionof the crank J, whose connection with the shaft J thus produces auniform and accurate stroke of the kuifecarrier and reverses themovement of the latter smoothly at each end of its stroke. The shaft Pis provided with a pinion, O meshing into a gear-wheeLO upon thecrankshaft J, and when the pulley P is clutched to its shaft the smallengine operates through the pulley and the wheels O and O to rotate thetherein.

crank-shaft J independently of the connecting-rod L. The weight of theknife-carrier presses it strongly downward in its inclined ways, and ifthe crank J were stopped upon the lower center the slide-valve in thechest h would receive no steam to start the carrier again upon itsupward movement. The provision of the auxiliary engine, connected withthe shaft J, effects the positive movement of the shaft J to turn thecenter at either end of the stroke, and thus wholly prevents thecrosshead from sticking at such points if stopped thereon.

To effect the rotation of the crank'shaft at the dead-centers of thecrank J, it is obviously' essential that the motor should either operatecontinuously, or,in the case of an anxiliary engine, rotate at adifferent rate from the shaft J. An auxiliary engine like that shown atP would require much less power than the main cylinder H, and wouldnaturally rotate at a much higher speed than the crank which isconnected with the knife-carrier. A belt applied in the same manner asthe belt P, but actuated by any other source of power than the auxiliaryengine P, would obviously produce an equivalent result. The log is heldduring the cut by dogs of peculiar construction attached to the stay-logD.

b are grooves in the stay-log; b", nut-blocks sliding therein andactuated by screws f f.

d are dogs with teeth I) at each end, and pivoted by studs at theirmiddle in sockets I) in the blocks. Tongues c on the ends of the dogsare fitted in grooves 0' within the surface of the stay-log to steadythe teeth I) when pressed into the wood. Two dogs, cl, are secured tothe lower edge of the stay-log, upon which the log rests when firstapplied, and a pivoted dog, (1 constructed like the dogs d, is affixedto one end of the stay-log, and a sliding dog, 0 is fitted to a groove,0, at the opposite end of the stay-log and actuated by a lever, (2 topress the log toward the pivoted dog (1 A toothed bar, is fitted in thegroove 0 and the lever (i is pivoted to the stay-log at e and to the barat 0 and the dog 0 is provided with a spring-pawl, c, which presses inthe teeth upon the bar 9, and is pushed forward intermittently when thebar is reciprocated by the lever. The dog a is shown in detail in Figs.10 and 11, with the tooth of the pawl project-ed below its lowersurface, so as to enter the teeth in the bar 9, while the dog itself isprovided with tongues c, fitted in corresponding grooves below thesurface of the stay-log to resist the strain of the wood when the teethof the dog arejammed The pawl is provided with a handle, 0 by which itmay be lifted out of the teeth of the bar 9 and slid outward to clearthe log when placed upon the stay-log. The dog may then be pushedforward to contact with the end of the log, and the reciprocation of thebar 9 then operates through the pawl to press the dog into the end ofthe wood. The lever is furnished with aslotted segment, dfland clampbolt(1 having a nutwheel, d, by which the lever may be clamped to hold thedog into the wood when adjusted. The log is first placed in contact withthe dogs (I and at", both of which are upon the sides of the log opposedto the strain of the knife, and the dogs d are afterward pressed by thescrewsf and f into contact with the wood to hold it against thestationary dogs during the cutting operation. Before the screws f areoperated the dog 0 is pressed into the wood to jam it firmly against thedog (P.

It will be noticed that each of the dogs (1' and (P has two teeth I),and is adapted to turn on its central pivot, b, as its teeth findabearing upon the wood, and each dog thus operates upon two distinctpoints in the wood as per fectly as two separate dogs, while requiringbut a single screw to operate both of the teeth I), where the dogs aremovable, as at d.

The screws are journaled in bearings f in the upper edge of thestay-log, and are pro vided with heads f for the application of a crankor handwvrench.

Fig. 4 shows in front'view the train of mechanism for operating thefeeding-pawls; and Fig. 5 shows, upon a larger scale, the feedwheels 0"and r, actuated by such pawls.

mt is a standard affixed to the beam 0', ad jacent to one of the screwsE, and carries two oscillating shafts, 0* and 0 The shaft 0 carries afeed-arm, m, containing an adjustable pin, 1*, which is oscillated by acam, m upon the crank-shaft J, the movement being transmitted to the armm by rod m bell crank m link m, and lever in. The lever m is pivotedupon the post B", and is provided with an antifriction roller, a to bearupon the cam. The shaft 0 is providedatitsinnerend with acrank, 0, whichis oscillated by a link, 0 attached to the arm m by a pin, 1',adjustable to and from the shaft 0, and the shaft 0 carries at its outerend the pawl crank r,, which oscillates the pawls r and r upon the teethof a wheel, 7". This wheel meshes into a feed-wheel, 1 upon one of thescrews E, and as the arm m has a uniform oscillation the adjustment ofthe pin r in the arm m determines the stroke of the shaft 0 and of thefeed pawl or pawls, and thus varies the rotation of the screws E and thedegree of feed imparted to the log. The pawl r is omitted in Fig. 5, andis combined with the pawl r to vary the feed one-half a tooth whendesired, as is common in such con strnctions.

The pawls are connected by means of a link, 8', lever s", and strap 5"with a weight, w, for lifting them from the teeth of the wheel 1*antomatically when the log is all cut. Thelever s" is pivoted to aprojection from the crank r, and the strap is attached at one end to thelever and at the other end to a bar, 8*, to which the weight is affixed,and is sustained during the feeding operation by a bolt, .9 which operates in a tapering notch in the side of the bar, as shown in Fig. 6.

The end of the lever s is connected by a spring, 9", with the pawl r andthe spring operates to counterbalance the weight of the lever 5 whilethe said weight operates through the spring to press the pawlsefiectively into the teeth of the feed-wheel, the pawl r having aleafspring, t, affixed to its under side to press the pawl 0' toward thewheel in the desired manner.

The rod 8* and weight 10 are shown in Fig. 5 as if dropped, thus pullingthe strap s downward and lifting the pawls from the feedingteeth, asshown by the pawl 1' but in Fig. 13 the pawl r is shown as in operationupon the teeth, with the pawl r as if lifted by the rotation of theteeth, and not yet dropped into the space between the two. To bring thepawls into action and set the feed into operation, the bar 8 is liftedby a treadle, w, the bar and weight being then sustained by the bolt 8and the pawls operating as in other constructions. The bolt is pressedinto the notch by aspring, s", and is connected by a rod, 5 with alever, 3 which projects upward by the side of the stay-log brackets Dinto the path of a tappet, 8 attached to one of such brackets.

The path of the knife in front ofthe beam 0 is indicated by the dottedline z in Fig. 6, with the front face of the log L correspondingtherewith, and the tappet s is so adjusted that when the log is all cutand the dogs upon the staylog D are nearly up to such line the tap petwill move the lever 8 and by withdrawing the bolt 8 permit the fall ofthe weight and rod 8 and the lifting of the pawls from the feedwvheel r.The oscillation of the arm m and the crank r then continues withoutproducing any further feed.

It will be noticed that the levers s" and the strap s are oscillatedwith the crank 1-, and the strap is therefore made of sufficient lengthto remain slack when the bar 5 is locked in its elevated position, asshown in Fig. 13, to avoid any tension upon the lever s", which mightdisplace the pawls from the teeth of the feedwheel.

The screws E operate upon stay-log brackets by nuts G affixed thereto,and the screws are journaled to rotate without longitudinal movement inoscillating sleeves t, which are fitted to bearings it upon the bed G.

The bearings are threaded internally, and

the sleeves are formed with external thread to fit the same, and areprovided with cranks t, by which they are oscillated through the mediumof a rod, 11 and a link, i, connected with a crank, t formed upon thearm at.

The rotation of the sleeves in the threaded bearings It operates toshift the screws longitudinally, and thus moves the log to or from thepath of the knife. The thread on the sleeves is of inch-and'one-halfpitch, and the rotation of the cranks t is sixty degrees, to retract thelog one quarter of an inch after each cut, so that the knife may moveover the cut surface to the upper end of its stroke without rubbing uponthe wood.

The arm m is oscillated by the cam m at each end of the carriers stroke,so as to act nate the feed in advance of the cut, and the threadedsleeves t are thus oscillated at the same time and operate to move thestay-log forward into the path of the knife at the com inencement ofeach cut.

The position of the parts shown in Figs. 4 and 5 is that during thecutting operation, eX- cepting that the pawl 9- would be in the teeth ofthe wheel 1" if feeding, and such position would be reversed at thelower end of the knife-carriers movement to retract the log and to bringthe pawl into position for feeding just before the commencement of theout.

In Figs. 2, 3, 5, and 6 is shown the means for entirely withdrawing thestay-log from the knife when a new log is to be inserted, and this meansconsists in a friction-wheel, V, affixed to the end of the feed-screw Eand rotated in either direction at pleasure by pressing against itsperipheryone or twoleather wheels V, which are rotated in oppositedirections. The wheels V are rotated by shafts Zfljournaled in anoscillating bearing, V and are rotated by connections to the auxiliaryengine, as shown in Figs. 3 and 4.

In Figs. 3 and 4, c is a chain-wheel driven by a chain from the shaft Pof the engine P, and o is a chain driven bya similar wheel, o connectedtherewith and applied to a chainwheel, 11*, upon one of the shafts Z(Shown in Figs. 4 and 6.) The shafts Z are connected by a pair ofspur-wheels, Z (shown only in Figs. 2 and 6,) and which thereforerotate'one of them in an opposite direction from the other. Ahand-lever, Q, is pivoted upon the beam 0 adjacent to the oscillatingbearing V and may be operated to press either of the wheels V upon thewheel V at the pleasure of the operator. \Vhen the pawls are withdrawnfrom the feed-wheel 2", the screws may thus be rotated by the frictionalcontact of the wheels V V to draw the stay-log back quickly to admit alog, or to push the same forward in readiness for cutting.

If required,a guide may be provided to hold the lever Q in a centralposition when not used.

From the above description it will be seen how the reciprocatingknife-carrier and its attached piston-rod are prevented from moving toofar at either end of their stroke, and it will be obvious that anyweight upon the crankshaft J-as, for instance, the wheel O -wouldoperate as a fly-wheel and effect the continued rotation of the shaftwithout any auxiliary motor, such as is furnished by the engine P.

The auxiliary engine is designed in practice to operate continuously,and the clutch-pulley P is thus in readiness at any moment to engagewith the shaft P to assistin rotating the crankshaft. Such continuousrotation ofthe engine maintains through the wheels 1; o" 'v" and chain aa continuous rotation of the friction-wheels V, and as these wheels arerotated in opposite directions by the gears Z the auxiliary engine thusfurnishes a constant source of power to propel the stay-log to and fromthe knife-carrier as when the log is consumed, although the auxiliaryengine may be unclutched from the crankshaft and the movements of thecarrier arrested.

In Fig. 4 it will be noticed that the cam is formed with two portions ofdifferent radius, both concentric with the shaft J, and that the rollern is shown in contact with the greater portion, which is the posit-ionoccupied by the parts during the cut.

A weighted arm, m, is affixed to the lever in to keep the roller incontact with the cam, and the parts of the cam which unite the twoconcentric portions, being at opposite sides of the crank-shaft, operateto actuate the feeding and clearance devices or threaded sleeves t atthe opposite ends of the knife-carriers stroke. The rotary motion of thecam thus effects the movement of the feed at the opposite ends of thestroke with great power and without concussion, and the connection withthe feed arm m of the threaded sleeves If, which retract the feed-screwsand stay-log after each stroke, enables the cam and the parts whichoscillate the arm to perform a double function, and thus reduces thenumber of parts, while securing an exact coincidence in all themovements.

My invention is adapted to cut veneers -from hard or soft wood, but ifconstructed of suitable strength may be used to out directly from'thelog smooth planed boards adapted for the manufacture of cigar-boxes,barrelstaves, or packing-boxes of any description. I have cut in such amachine hard oak and walnut logs over eighteen inches in width and fourfeet long into boards three-quarters of an inch thick, one such boardbeing cut from the log at each stroke of the knife-carrier and itsattached steam-piston, and such strokes being performed from twenty toforty times per minute, as desired.

I am aware that a saw-gate provided with a gang of saws has beenconnected, through the medium of a rock'shaft, a sliding joint in alever, and a connecting-rod, to a rotary crankshaft, by which the strokeof the saw-gate was regulated; and I do not therefore claim such meansof regulating the stroke, broadly.

In my construction the knife-carrier passes over the side of the logwith a knife-blade projecting beyond its plane surface, and theconnecting-rod is pivoted directly to such carrier and to the rotarycrank, by which great simplicity and cheapness of construction areeffected. Furthermore, the location of the crank-shaft at the end of thesteam-cylinder opposite to that upon which the knife-carrierreciprocates secures a peculiarly compact construction, as it affords asuitable length for the connecting-rod and avoids extending the machineto a great length, which would be unavoidable if the reciprocatingcarrier were connected with a crank-shaft in the opposite direction.

It is obviously immaterial to the co-operation of the knife carrier, theconnected crank shaft, and the auxiliary motor (which prevents the maincrank from sticking on the centers) whether the carrier be moved in aninclined position, as shown in Fig. 1 of the drawings, or be movedhorizontally or verti call y by a horizontal or vertical arrangement ofthe ways F F. It is also immaterial how the auxiliary motoroperates uponthe crankshaft J, provided it operates, as set forth above, to rotatethe shaft independently of the power transmitted from the cylinder Hthrough the connecting-rod L. A moving belt or other gearing operated byany auxiliary power would obviously be an equivalent for the belt P,actuated by the pulley P upon the engine P.

Having thus set forth my invention, what I claim is- 1. In a veneer orwood slicing machine, the combination, with a reciprocating carrierprovided with a knife projected from the side of the carrier, of areciprocating steam pistonrod attached directly to such carrier, arotary crank, and a connecting-rod pivoted directly to such carrier andcrank to regulate the stroke of the piston-rod and carrier, and feedingmechanism actuated by the rotary crankshaft to feed the side of the logtoward the knigf, substantially as and for the purpose set ort 2. In aveneer or wood slicing machine, the combination, with a reciprocatingknife-carrier provided with a knife projected from the side of thecarrier, of a reciprocating steam piston-rod attached directly to suchcarrier, a rotary crank, and a connectingrod pivoted directly to suchcarrier and crank, a movable stay'log presenting the side of the logtoward the knife, feeding mechanism for intermittently actuating thestay log, and an auxiliary motor for turning the crank at thedeadcenters, as and for the purpose set forth.

8. In a veneer or wood slicing machine, the combination, with areciprocating knife-carrier provided with a knife projected from theside of the oarrier, of a reciprocating steam piston-rod attacheddirectly to such carrier, a rotary crank,and a connecting-rod pivoteddirectly to such carrier and crank, a movable stay-log presenting theside of the log toward the knife, feeding mechanism for intermittentlyactuating the stay-log, and an auxiliary motorengine connected with thesaid crank and rotated at a different rate from the said crank tomaintain its motion at the'deadcenters, as and for the purpose setforth.

4. In a veneer or wood slicing machine, the combination, with areciprocating knife-carrier provided with a knife projected from theside of the carrier, of a reciprocating steam piston-rod attacheddirectly to such carrier, a rotary crank, and a connecting-rod pivoteddirectly to such carrier and crank to regulate the stroke of thepiston-rod and carrier, a movable stay-log with feedingmechanism forfeeding the stay-log intermittently toward the knife, and an auxiliarymotor connected with the said crank by a clutch mechanism and operatedto turn the said crank at the centers, and to reverse the feedingmechanism when desired, substantially as herein set forth.

5. In a veneer-cutting machine, the combination, with a reciprocatingknife-carrier, of a steam piston-rod to reciprocate such carrier, arotary crank connected with such carrier by a pivoted connectingrod, acog-wheel having shaft connected with said crank, an intermediate shaftprovided with pinion and with clutch-pulley, and an auxiliary engineconnected with such clutch-pulley, as and for the purpose set forth.

6. In a veneer-cutting-machine, the combination, with a reciprocatingknife-carrier, of a steampiston-rod to reciprocate such carrier, arotary crank-shaft and crank connected with such carrier by aconnecting-rod, a stay-log movable to and from the knife-carrier, screwsjournaled in bearings and fitted to nuts upon the stay-log, detachablefeed mechanism applied to such screws, means for connecting the screwsto rotate together, a friction-pulley upon one of said screws, and arotating frictionwheel with means for pressing it against suchfriction-pulley to retract the stay-log when the feeding mechanism isdetached.

7. In a veneer-cutting machine, the combi nation, with a reciprocatingknife-carrier, of a steam piston-rod to reciprocate such carrier, arotary crankshaft and crank connected with such carrier by aconnecting-rod, a stay-log movable to and from the knife-carrier, screwsjournaled in bearings and fitted to nuts upon the stay-log, detachablefeed mechanism applied to such screws, means for connecting the screwsto rotate together, a friction pulley upon one of said screws, twofriction-wheels rotated in opposite directions, and means for pressingeither of them at pleasure upon the frictionpulley, as and for thepurpose set forth.

8. In a veneer-cutting machine, the combination, with a reciprocatingknife-carrier, of a steam piston-rod to reciprocate such carrier, arotary crank-shaft and crank connected with such carrier by aconnecting-rod, a stay-log movable to and from the knife-carrier, screwsjournaled in bearings and fitted to nuts upon the stay-log, detachablefeed mechanism applied to such screws, means for connecting the sore wsto rotate together, a friction-pulley upon one of said screws, anauxiliary engine detachably connected with the crankshaft, and tworiction-wheels rotated in opposite directions by said auxiliary engine,and means for press ing either of them at pleasure uponv the friction-pulley, as and for the purpose set forth.

9. In a veneer-cutting machine, the combination, with a reciprocatingknifecarrier, of a steam piston-rod to reciprocate such carrier, arotary crank-shaft and crank connected with such carrier by aconnecting-rod, a staylog movable to and from the knife-carrier, screwsfitted to nuts upon the staylog, sleeves threaded externally and mountedin threaded bearings,

and having the screws journalecl therein with In testimony whereof Ihave hereunto set !I 1;,- shoulders to prevent longitudinal movement,hand in the presence of two subscribing Wit feed mechanism applied tosuch screws, and nesses. means for actuating such feed mechanism andTHOS. S. CRANE. for oscillating the threaded sleeves at the op-Witnesses:

posite ends of the knife-carriers stroke, as and HENRY J. MILLER,

for the purpose set forth. F. O. FISCHER.

